Study of Mathematics at Universität Bielefeld, Germany (1982-1990), Diploma in Mathematics in 1990.
Assistant at Freie Universität Berlin (1990).
Study (Fulbright Scholar) and Assistant at the University of South Carolina, USA (1990-1991).
Ph.D. student (Grant from the Graduiertenkolleg "Algorithmische Diskrete Mathematik'') at Freie Universität Berlin (1991-1994), Dr. rer.nat. 1994.
Research Assistant at SINTEF, Oslo, Norway (6 months, 1994).
DFG-Project "Multiscale Methods for Operator Equations'' at the Weierstrass-Institut for Applied Analysis and Stochastics, Berlin (1994-1997).
Associate Research Scientist at the Institute for Scientific Computation, Texas A&M University, College Station, USA (6 months, 1995).
June 1997 - September 1999: Wissenschaftliche Mitarbeiterin at RWTH Aachen.
October 1999 - October 2007 : C3 (Associate) Professor, Institut für Angewandte Mathematik, Universität Bonn.
June 2000 : Habilitation, RWTH Aachen.
October 2007 - September 2013: W3 (Full) Professor, Chair Complex Systems, Institut für Mathematik, Universität Paderborn
April 2010-July 2012: Director of the Institut für Mathematik, and Vice-Dean, Faculty for Electrotechnics, Computer Science and Mathematics, Universität Paderborn